Commutator neck or lead.



A. P PEGK. COMMUTATOR NECK 0R LEAD. APPLICATION FILED-E019, 1905.

9,353 831; Patented New. 1?, 1908 mvxbm awe/g T. Pux

UNITED STATES PATENT OFFICE.

ASHLEY P. PECK, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE BULLOOKELEOIRICMANU FAGTURING COMPANY, A CORPORATION OF OHIO.

COMHUTATOR NECK LEAD.

Specification of Letters Patent.

Patented Nov. 17, 1908.

To all whom it may concern:

Be it known that I, ASHLEY P. PECK, a citlzen of the United States, andresident of 'Milwaukee, in' the county of Milwaukee and namo-electricmachines, considerable trouble" has been experienced because of thevibrationof the commutatorleads or necks, this vibration often beings'uificientto cause adjacent-commutator necks to engage to shortcircuitone or more of the armature coils.

Thishas been especially the case in'large machines which necessitatelong commutator necks. To avoid this vibration, it has heretofore beenfound necessary to em loy special bracing auxiliary devlces, suc as fishcord lacing or insulating spacers between the adjacent necks.

It is the object of my invention to so construct the commutator necksthat they will besuificiently strong inherently to Withstand anytendency to vibrate'and thereby obviate the necessity-of employingauxiliary bracing devices. This result is accomplished by makingeach'ofthe commutator necks of a cross section which-is other than a straightline,

so that in order to vibrate in any direction, the metal composing theneck will have to be bent edgewise to' a greater or less degree.

The particular novel features .of'my invention will appear from thefollowing description and will be pointed out in the claims. 5

Figure l is a plan View of a commutator neck or lead embodying myinvention; Fig. 2Iis an end view of the same, partly. in section; Fig. 3is a transverse sectional view on the line 3 -3 of Fig. 1; Fig. 4-. is asimilar sectional view showing a somewhat modified construction; andFig. 5 1s a partial end elevation of an armature and a commutatorprovided with my improved'necks or leads.

Referring to the drawin s, 1 and 2 repre: sent two parallel stri s osheetcopper or other suitable material, held together by rivets '3toform the .neck or lead. These strips are preferably punched out androlled into the desired form 1n one operation. Each of the'stri s isformed with a central longitudinal ri or corrugation 4, as shown inFigs. 1, 2 and 3, thus making the stri 8 substantially U-shaped in crosssection, whereby the twov strips may be nested together as shown. Thecorrugation 4 extends along the central portion of the strips 1 and 2nearly to each end thereof, one end of the strips being bent as shown toreceive the free ends 6 of the armature windings 7 while the oppositeend may be left flat for connection to the commutator bars 8, as, shownin Fig. 5.

In Fig. 4 the two strips are shown as having-oppositely projecting edges55, each strip thus being substantially lJ-shaped in cross section, andthe two'strips placed together base to base.

The armature windings and the commu tator may be of any desired type, asper 36 they form no part of my present invention.

By making my commutator neck or lead sc that throughout a portion of itslength the cross section is other than a straight line, a much greaterstiiiness or rigidity is given to the neck, thereby eliminating orgreatly reducing vibration and renderingaccidental electr cal contactbetween adjacent necks impossible. Moreover by reducingor avoidingvibration of the necks, crystallization of the copper or other metalforming the necks is prevented or greatly diminished, thereby lesseningthe liability of fracturing the necks.

My invention is also applicable in other electrical apparatus althoughit is primarily designed for use as a commutator lead or neck.

VVh'at I claim is 1. A commutator neck or lead composed of a pluralityof similarly corrugated strips of sheet metal. nested and rivetedtogether.

2. A commutator neck or lead composed of a plurality of-strips of sheetmetal fastened together, each strip being corrugated lengthwise.

3. A commutator neck or lead composed of a plurality of strips of sheetmetal fastened together, each strip being substantially U-shaped incross section. v

4;. A commutator neck or lead composed of a plurality of strips of metalfastened together, eachQstrip having a transverse section two sides ofwhich are substantially parallel and are other than straight lines.

5. In combination, an armature coil, a commutator-bar, and a neck orlead composed of a plurality of lengthwise corrugated strips of metaljoining them.

6. In combination, an armature w nding,

:1 commutator, and necks or leads connecting them, said necks or leadsbeing composed of strips of metal substantially U-shaped in crosssection.

' 7. In combination, an armature coil, a commutator bar, and a .neck orlead connecting them, saidn'eck or lead being composed of a plurality ofstrips of metal fastened together and each having a transverse sectiontwo sides of which are substantially parallel and are other thanstraight lines ting elevations and depressions.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukeein the county of Milwaukee and State of Wiscousin in thepresence of two witnesses.

ASHLEY P. PECK.

Witnesses:

H. Gr. UNDERWOOD, GEORGE FELBER.

